Button-cutting tool.



N. BARRY, JR.

BUTTON CUTTING TOOL.

APPLICATION HLBDAPR. 1a, 1908.

9,146,407, I Patented Manso, 1909.

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Snot-H1155 NICHOLAS BARRY, Ja., or rvlusosfiiun, IOWA.

BUTTON-CUTTING TOOL.

Specification of Letters Patent.

Patented March 3o, 1909;

Application filed April 1S, 1908. Serial No. 127,792.

istocks and has especia-l reference to the manufacture of tools for cutting buttons, and particularly' the tools used in machines for facing and centering buttons made from shell, wherein it is of the greatest importance that the tool shall always operate exactly and uniformly upon thel blanks, so as to produce buttons of unifornifinish.

'lhe' invention 'is especially adapted for use in connection with thc automatic button linishing machines shown in my Patent #643,5S7, dated February 13, 1900; and in the tool-holders shown in my Patent' #863,4t97, dated August 13, 1907, but is of course applicable to 'other machines, and. for other purposes, in the arts, where an accurate, working tool is desired. In such but ton finishing machines it is essential that the tool beheld positively and accurately, in such mannelthat it cannot have any lateral or torsional deiection; also that the tool be kept uniformly sharp, for which. purpose the tools are customarily. subjected to the action of a grinder, after each operation;

third, that the tool be fed up to working position as it is ground or Wears, so that the blanks upon which the tooloperates will be 1cut to uniform size and shape byfsuch too 'The primary objects of the present invention therefore are to produce a tool-stock from which tools 4vof varied working face can be easily made, and any of which will tit the holder, so'that tools of varied shapes can be interchangeably held in the holder; second, whereby all surplus metal will be l removed from the tool, so that there will be f l less stock to grind in sharpening the tool,

and consequently the grinding wheel or diskl y will not glaze nearly so quickly, and the sharpening operations will ,be facilitated; and, thirdly, whereby the tool can be positively held against twist or lateral delection while in use.

The invention therefore consists in the novel tool-'stock and tool as set forth in the claims, and hereinafter described and illustrated in the accompanying` drawings r.forming; part of this specification, in which- Figure l is an edge vie\v,'and Fim 2 is a front view of a piece of the tool-stoctlr. Fig. 3 is an enlarged cross-section thereof. Fia. 4L is a transverse section of the tool and toolholder; and Fig. 5 is a detail sectionon line 5 5, Fig. 4, with part broken away to show slide C2 in section.

-The tool-stock is preferably made of l rolled barsteel; and for buttonfinishing tools, this stock is made oblong in crosssection, having a longitudinal groove lZ1 in its front face, near one` edge, so that when the end of the tool is ground on a bevel, as indicated in Fig i, the wider part or side 1, will cut out the center of the I,face of the blank, and the grooved part l@ will form a bead around the edge of the face of the blank. By varying the position and shape of groove l, the contour of the face of the finished blanks can be varied. The two -rear corners of the stockat the rear side thereof opposite -thc groove, are cut away or beveled longitudinally, as at l, la; and the front corner of the stock adjacent the outer, or shallowest, edge of groove l, is also beveled as at l", so that. instead of the stock bein@ rectangular in cross-section, it becomes obtusely polygonal, and the beveled portions l", 1, le, and the two straight faces 1l and 1g, (F ig. 4) form bearing faces against which the ltool holding devices contact.

As shown in lli`igs. et and 5, the tool holding devices comprise, preferably, three grooved rolls c, 0," 02, the rolls e, c being arranged one above the other at one side of the tool-stock. and the roll c2 being preferably arranged at the opposite side of the tool, intermediate rolls c, c. an adjustable slide C2 pressed forcibly toward rolls c, o', by means of a spring 0*. The' construction of the tool-holder is more particularly set forth in my Patent #863,497 above referred to. It will be seen thatl the rolls c, c', are shouldered as at e so as to engage the beveled face 1e of the tool, and

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als-o the straight face 1g thereof; While the straight face 1f of the tool bears against the side of thecasing C in which the rolls c, c. are journaled. The roll c2 has a V-shaped groove, the sides of which engage the opposed beveled edges or faces 1b, l, of the tool, see Fig.l Ll.

By reference to 3 and 4 it Will be seen that the tool has five faces bearing against the holding devices, and these are so located that it is impossible for the tool to turn or twist in the holder, and it Will be held rigidly as regards lateral or torsional movement or deflection, While at the saine time it can be readily moved or fed forward endwise through or between the holding rolls, as set forth in my aforesaid patent. l

By reason of the removal of the metal at the corners thus forming the faces l, 1, l, andthe groove la, considerably less metal will have to be ground in order to keep the tool sharp7 than Would be ground if the corners were square. Also that there will be less heating of the metal, in grinding it; and at the saine time ample metal is left in the stock for the operative parts of the 'toola Further by removing the corners of the tool and providing it with bevel bearfaces l, le, 1b, at What n'fould otherbe right-angled corners, l obtain three ional ing surfaces for the tool, b. it to be held securely in riive position; the stock having seven ng faces as agai st four in the ordinary and the bevel faces la, le afford broad for the tool against the holder at poiniv Where the most strain is naturally exerted; and the beveled surfaces of the are the most advantageous position to re ist the torsional. and twisting strains impar. l to the tool by reason of the broad fruiting edge le being located principally to of the axis of the tool.

having described my invention what I eiefiov claim as new and desire to secure by Letters Fatent is: l. A button cutting tool comprising a bai having a plane surface on its front face, on one side, and on its baclr7 said side plane surface being substantially at right angles to the front and rear plane surfaces; and the two rear corners of' said bar being also beveled to form longitudinal hearing surw faces each atan angle to the adjacent plane surfaces; said bar also having one of its front. corners beveled to .form a third longitudinal bearing surface at an angle to the front face, for the purpose and substantially as described. v

A tool for' facing buttons, comprising a metal bar having a longitudinal groove in its front face, and having its two rear corvners beveled to form longitudinal bearlng 'surfaces inclined to its rear face, and also having one front corner adjacent the groove beveled to form a third longitudinal bearing surface inclined to the front face, substantially as and for the purpose set forth.

3. The'herein described tool for cutting )uttons comprising a bar approximately oblong in cross section, and having its front, rear and one side provided with plane surfaces,'and h ving a longitudinal groove in its front face and also having its two rear corners beveled to form longitudinal bearing surfaces at an angle to the plane surfaces, and also having one of its front corners beveled to form a third longitudinal bearing surface at an angle to the front side of -the tool, for the purpose and substantially as described.

l'n'testimony that I claim the foregoing as my own, I aflix my signature in'presence of tivo Witnesses.

NCHOLAS BARRY. JR.

lVitnesses i M. W. STAPLETON, AGNES R. FULLER. 

